20171+4127 ARN  97

 
 
20h 17m 01.24s +41 26' 45.3" P.A. 220 sep 12.8 mag 9.96,10.71 Sp OB
 
 
Coord 2000
20171+4127
Discov num
ARN  97
Comp
Coord arcsec 2000
20 17 01.24 +41 26 45.3
Date first
1892
Date last
2015
Obs
12
Pa first
221
Pa last
220
P.A. Now (θ)
220°
Sep first
12.6
Sep last
12.8
Sep. Now (ρ)
12.8"
Mag pri
9.96
Mag sec
10.71
delta mag (ΔM)
0.75
Spectral class
OB (blue)
Pri motion ra
-001
Sec motion ra
-002
Pri motion dec
-004
Sec motion dec
-006
Notes
rPM=0.354
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
220.1
Precise sep
12.79
Constellation
Cygnus
Tycho2
3159-00885-1
Gaia DR2
72283942400
HD
228742
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20171+4127 ARN 97 2007 5 220 12.8 9.96 10.71 D 201701.24+412645.3
20171+4127 ARN 97 2010 7 220 12.4 9.96 10.71 OB 201701.24+412645.3
20171+4127 ARN 97 2015 8 220 12.8 9.96 10.71 OB 201701.24+412645.3

If you need more information about this double, apply for a data request form to the WDS.